/*******************************************************************************
 * Software Name : RCS IMS Stack
 *
 * Copyright (C) 2010-2016 Orange.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.gsma.rcs.platform.network;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * Android HTTP connection
 * 
 * @author jexa7410
 */
public class AndroidHttpConnection implements HttpConnection {
    /**
     * HTTP connection
     */
    private HttpURLConnection connection = null;

    /**
     * Open the HTTP connection
     * 
     * @param url Remote URL
     * @throws IOException
     */
    public void open(String url) throws IOException {
        URL urlConn = new URL(url);
        connection = (HttpURLConnection) urlConn.openConnection();
        connection.connect();
    }

    /**
     * Close the HTTP connection
     * 
     * @throws IOException
     */
    public void close() throws IOException {
        if (connection != null) {
            connection.disconnect();
        }
    }

    /**
     * HTTP GET request
     * 
     * @return Response
     * @throws IOException
     */
    public ByteArrayOutputStream get() throws IOException {
        if (connection != null) {
            return sendHttpRequest(HttpConnection.GET_METHOD);
        }
        throw new IOException("Connection not opened");
    }

    /**
     * HTTP POST request
     * 
     * @return Response
     * @throws IOException
     */
    public ByteArrayOutputStream post() throws IOException {
        if (connection != null) {
            return sendHttpRequest(HttpConnection.POST_METHOD);
        }
        throw new IOException("Connection not opened");
    }

    /**
     * Send HTTP request
     * 
     * @param method HTTP method
     * @return Response
     * @throws IOException
     */
    private ByteArrayOutputStream sendHttpRequest(String method) throws IOException {
        connection.setRequestMethod(method);
        int rc = connection.getResponseCode();
        if (rc != HttpURLConnection.HTTP_OK) {
            throw new IOException("HTTP error " + rc);
        }

        InputStream inputStream = connection.getInputStream();
        ByteArrayOutputStream result = new ByteArrayOutputStream();
        int ch;
        while ((ch = inputStream.read()) != -1) {
            result.write(ch);
        }
        inputStream.close();

        return result;
    }
}
